Developer Tools
A suite of secure, offline-capable utilities for developers. Format JSON, decode Base64 and JWT payloads, or generate cryptographically secure UUIDs without ever risking a data leak.
Base64 Encoder & Decoder | ToolXHub
Encode or decode Base64 strings securely in your browser.
Local ProcessingHigh AccuracyInstant Speed
JSON Formatter & Validator | ToolXHub
Format and validate JSON strings instantly. 100% local, secure processing.
Local ProcessingHigh AccuracyInstant Speed
JWT Decoder Online | ToolXHub
Decode JSON Web Tokens securely without sending them to a server.
Local ProcessingHigh AccuracyInstant Speed
URL Encoder & Decoder | ToolXHub
Encode and decode URL parameters safely and instantly.
Local ProcessingHigh AccuracyInstant Speed
UUID/GUID Generator Online | ToolXHub
Generate secure, random UUIDs (v4) instantly in your browser.
Local ProcessingHigh AccuracyInstant Speed
Frequently Asked Questions
Are my JSON strings and JWTs safe to paste here?
Yes. All developer tools on ToolXHub execute locally via your browser's JavaScript engine. Your payloads are never sent over the network.
How does the JWT decoder work?
It splits the JWT string by the periods and decodes the Base64Url payload to reveal the JSON data. It does not verify the signature, meaning it doesn't need your secret key.
Are the UUIDs truly random?
Yes. We use the industry-standard 'uuid' npm package utilizing the crypto.getRandomValues API in your browser to generate cryptographically secure UUID v4 tokens.
Can I use these tools offline?
Yes, once the page has loaded, you can disconnect your internet and securely format JSON or encode Base64 strings.